I wasn't sure if I wanted to put mine up for critique in here or not, but a lot of good advice seems to be on the table, so I'm going to:
Link
Left and right arrow keys move the character
Up arrow is jump
Down arrow allows you to drop off of many platforms
Space bar throws a seed
What I'd really like some feedback on is the level of difficulty of pulling off some of the character's abilities. Mostly, the first seed in the upper-left hand corner (click the seeds to change from one to the other). When you throw that one, you'll see a flower grow on the ground where the seed hits. Click the flower to sort of "posess" it. Then use the up and down arrow keys to make it grow taller or shrink. Click back on the character to regain control of him.
Is this too difficult? Should I make him automatically go into the "posession" mode? the only problem with that is, then you can't ride the platform as it rises.
There is a bug I still need to work out with regard to the platforms you can create (the flower, and the vine-bridge), and the 3rd seed will snare enemies when they get too close to it.
Background, in case you're interested, is that this little fella is a plant-based life-form who lives in something like a State-park in Wiggi World. A group of kids on field-trip visit the park and leave litter behind them, so this little guy takes it upon himself to clean up the forest after them. You'll get more points for items that can be recycled, and your power bar will gain points (right now it is set really high for testing purposes) so that you can use his "green thumb" powers to greater and greater degree. So the moral of the story is "respect the environment" (too tree-huggish?).
The file-size is currently pretty small (182 KB), but I am afraid of the onset of lag... and having to try and do tons of optimization that I am not otherwise doing/have not coded.